Jarring-machine.



L. M. ATHA.

JARRING MACHINE. APPLICATION FILED AUG,27,1909.

Patented Aug. 16,1910.

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LOUIS M. ATHA, F NEWARK, NEW JERSEY.

tannins-MACHINE.

Specification of Letters Patent.

Patented Aug. 16, 1910.

Application .filed August 27, 190 9. Serial No. 514,842.

To all whom it may concern: v

Be it known that I, LoUIs M. ATHA, a citizen of the United States, and a resident of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements" in Jarring-Machines, of wh1ch the following is a specification.

My mventionrelate's to improvements in jarring machines for forming sand molds.

ff One of the-objectsof the invention is to produce such a machine at' low cost and uniform speed and the table dropped with- .whicl mayb'e cheaply, operated. v Anothe r object of the invention is toso constructthe machine that the table on which the flaskor mold is placed may be 'raised at out injury to the raising mechanism.

- Another-object is to so construct a ma chine that sand and dirt will not drop into the pit in which the machine is placed, but

- which will throw said dirt or sand away lent sizes upon the table.

from the machine when the table is being raised.

Another object. is to provide improved means for securing flasks or molds of differ- Other objectswill, appear from thehereinafter description.

An-embodiment of the invention is hereinafter set forth and illustrated in the accompanying drawing forming part of this application, but it is to be understood that the invention is not confined to the exact con" struction here shown and described.

Referring now to the drawing in which the same reference character indicates the a side elevation of the machine partly in section taken on line 1 of Fig.2.. F g. 2 1s a plan view. Fig. 3 is a sectionon l ne 3 of Fig. 1. Fig. 4 is a sectionalview of a modified construction Fig. 5 is a detail of the construction shown in Fig. 4. Fig. 6 1s a sectional view on a smaller scale showing the machine located in a pit and showing the meansv for keeping the pit freefrom sand 1 and dirt, said view also showing the means for securing theflask or mold to thejarring table. '50- The part marked 10 on the drawingrepresents the bed or-base of the machine which maybe supported inanysuitable manner. 7

cated. The upper end of the base is re cessed at 12. In the bottom of "the recess is a pad or shockabsorbing element 13. 14 is the table on which the flask or mold is secured. Projecting from the bottom of the table and fitting snugly in the recess 12 of'the base is the plunger 15. Extending from-this plunger and through an opening 16 in theupper part of the base into the recess 11 of said base, is a rod 17 having a roller 18 in the end thereof.

l9fi's a pin which projects from a lug 20 on the upper side of the base into an opening 21 in the table. This pin prevents the table from turning in the base.

Mounted in the base 10 is a shaft 22 having a gear 23 secured thereto.

24 is a motor. On one end of the shaft of drive the same, is a pinion 25. Secured on the shaft 22 and within the recess 11 of the housing is a vertical cam 26 the face of which moves in contact with and under the roller- 18 during the rotation of the shaft 22. The

highest point of this cam isindicated by the re erence letter a. and the lowest point by b.

I The continual rotation of the shaft 22 by the motor24t will cause continuous rotation of the cam 26 which will continuously raise and permit the table to drop, thus jarring, shaking down and packing the sand in the mold secured to the top of the table. The surface of the cam is so shaped that the table is raised at uniform speed and when the point a of the cam passes from under the roller, the table will drop with a jar. The roller 18,

however, will not fall on the surface of the cam and the table will be supported at the fall by the lower end of the plunger 15 coming in contact with the lower part of the re cess 12 in the base of the machine, and the element 13 will take up or absorb the shock of the fall of the table.v This element, however, may be dispensed with. By so constructing these parts that the roller 18 will not drop upon the cam, the life of the roller 1 and the cam will be materially prolonged and the shaft 22 will not be hammered out of alinement.

desired, the recessll may be filled with "run in oil.-

oil so that the parts inclosed therein may be In -Fig. LI have'shown'a modified construction of the cam and means for operating the same; In this construction I have shown a horizontal .c'am'26 consisting ofa ring so mounted in the housing that the face of this a cam ontheedge of the ring will 'move under the roller 18. This cam ring is secured to the stud 22 on the lower end of which is-a bevel -.gear meshing with another bevel gear 31 on the suitablevpower.

To secure a end of the shaft 32drivenby I flaskto the top otai table and to permit the use of ,diiferent sized flasks .thereon,'the following means have been provided. The flask to be secured is marked and has outwardly projecting flanges c around the four sides thereof. 40 re resents two barsextending over the top -0 two of thefianges on opposite sides of the mold.

Extending, along the other-two sidesof-the mold and over the topof the ends of the bars 40 are plates, or bars l1 having holes 42 in bolts43 secured at each corner of the table 7 and" projecting upwardly therefrom. representsnuts which are placed on the ends of these bolts after the bars 40 and 11 are in '30 In Fig. 6 he machine is shown somounted in which the ends thereof through which .pass the place. By pressing up on these nuts the bars 41 areforceddownonthe. ends of the bars 10 securely'clamping thefiask to the top of the table and the construction is such that the bars 40 can be pla'ced closer together. or

, -or greater area may beplaced and securely.

moved-farther apart so that a flask of smaller held on thetabler v v The machine is usually mounted in a pit belowthe fioor'level so that the table will be f substantially on the same level as the floor.

represents the pit and'50 the floor. The floor, has an opening '03 substan-.

tially of the same shape and area as the table of the machine.- In such a construction, however, there is an opening51-between the inner edge of the floor and the edge of the j table so that when a flask-is being filled or frequently during the operation of 5o; dirt [will fall through said opening into the Y pit andonto the machinery -t zontained therein the table,

. :'so that trouble is caused.- To prevent 1.-isa,nd, dirt and the like from falling through said '0 ening 51,1 have secured the edge. ofthe tablefand the inner edge of the floor -a flexible strip 52. When the table is in its lowest position and on a level with the floor this. strip will fold-up, as shown in dotted 4 lines. When the table is raised bythe cam,- as hereinabove described, thisstri will be 's'preadjinto thei position shown. by Owing to themovement of the'tab tr p .2. isl p d q k arm-ems jar 1. In a ,device t :i I

l the-eras twe he-fi s flip away. from table any sand or. dirt that may be joi1- said strip. This construc tion not only'prevents sand, vdirt, etc,,- fr0m falling into the {it through the 0pening-51,

but throws the same away from the table and out on the floor "50 during the rapidupward movement of the table.

ters Patent is:

base havinga recess therein, a cushion at the of the class described,

Having'how described my invention, what I I claim as new and desireto secure by- Let: f

bottom of therecess, a table, means con'nected tothe table, acam to'contact'with said means to raise the table, said-.cam'bein so constructed asto permit the table to rop suddenly and to contact with the cushion.

2. In a device. of' the. class described, a

base having a recess therein, a cushion at the bottom of the recess, a. table, a plunger con- .nected to the table and movable insaid recess, a rod connected to the plunger and passing. through an opening in the, base, ,a (i cam to contact with said rod to raisethe;

so constructed as to table, said cam -bein permit the table to rep: suddenly and; the plunger to-contact with the cushion t-o'hold the rod outof contact withthe cam.

3. In a device ofjthe class described, a base I having a recess in the top thereof and a a pin to prevent theftable from turning a nected to said plunger and extendin base, means'for rotating the shaft, a cam se-' cured to said shaft and mounted in said secend-mentioned recess, said cam contacting with said rodandsoconst'ructed as to raise the table, a'nd'to 'permit it' to drop 1 suddenly, and the plunger ztolcontact with the bottom. of-the first mentioned recess'tohold'the rod outlofcontact withfthecam.

4. In a device oit'the .iclass aesaibta, a 'base,r a table .mountedin said 'base,z means' for raising the table to it to drop suddenly, aflask-havin anges-mountedjon the table, .and3'bers ;-connected to said rods and saidflanges to secure the said flask ,thejtablef,

said openingwitha space between the edges i of the table an the .floorfmeans for jrec1procating" the t le, and flexible connections between the edges ofth'e table and the-floor covering} said*recess,. as I and *forthe pur- .1 6.; In ag d "1- T f the class described, a- "floer" v,fjvopen -ingtherein, a" table .in

it' 5. Ina-device 10 f;the' class-described, a floor havingan openingtherein, a table-in of the table and the fioor, a pit underneath my hand at New York county of New York said table, means in the pit for raising the and. State of New York, this 20th day of 10 table-above the floor and to permit it to drop August, 1909.

to its normal positionfand a flexible member connected to the edges of the table and to the L0 Um ATHA' edges of the floor to cover the space be- In presence 0i" p tween the edges of the table and the floor." JOHN J. RANAGAN,

In Witness whereof I hsve hereunto set ISABEL R. RICHARDS. 

